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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07016e3b762aee2a5a53494062331c5a07981136ea3325de5bd8e82b95643608' 
  AND token = 'mL/vVjdotAIik53FCCA0gOwZsa4XENvFpnvOYh8nMt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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