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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f1737cbbe07fd757144f378f3c5a6ba437c01227e0b4e56134d32f5ce9aec4df' 
  AND token = 'TrGGjMXq9a1Iuc1e8+usogeAu1pvpjtOCdqDCaCWGyo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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