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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3e60ca0cb33dc370d95e294240a95fcac4290c481c39dd38a9153bd130994a1a' 
  AND token = 'Imk7nTHyB66ze6K+nOj06lemw+1u8B8XSB9FT3+MHRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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