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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '01a53ab65046443c8cd23cdfeaf65eaeeff4322b1471bc8e701c9de9bdfa604a' 
  AND token = 'dXXm64sCbplQKvYHbjCXn+ykcNMitM8woIdf7J+CpxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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