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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b3124e9dd4c711eb1417ca3cecb19bd32d2b36719505b0c0d77ee648d141a7a6' 
  AND token = 'AmMLKO+eqa3GyW374pEuX31B/VZrwNaL9n1wbpbKfoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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