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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '858cb57187e7863de0b3a606f8e67e5e3d05cf499f4d43750128d12e7a90641c' 
  AND token = 'YrLB5eAIsH55I4jnvJ6iG1pC8Z7YK0MTx2uI98/k7KQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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