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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31ae7202a3f13625540e8d2b544cbb698c5ffe055106d9e1cf3babcaf04c5fe1' 
  AND token = 'RK0Jk3XSX6LmU3750s1kGzl0y09t6G3q2KgO8cFqP0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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