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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01de45fb3912750b2c2e3eb3f13f43c1b2b047f3426762ce9e3421070ca82f60' 
  AND token = 'C1evXxHRcgIPs8ydnB0OlBMs1KVt3aQubu+5Due/5cg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}