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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '44209ca54533ca470809005d57833c40ddb94a6c6e3f20a7693ed57e60b642d7' 
  AND token = '+C7L1vbgaPnyoT6aTEHRHSQy9Mul8QC0JDl+Mg0PYDs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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