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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed4549bf91f775dab57257702c4f2298beb1c8d01538fac66ad7f71e8eb7547a' 
  AND token = 'DG2wqOJ4r0fyUrf7EPu3iFJ3h0I0UFQCHem5CvQixdA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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