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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b07156f05dd90a42cb99626ea81cd97ff52beebaf5d30ef6d6c47171e09bcdee' 
  AND token = 'bUcuhuYhPi3Q2JNh2SDhVSIApyAt1cFClwOezNmQUd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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