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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c0e525e981d1565c68ca062113155ef9637d4a17f5848908b18b710e31dade1d' 
  AND token = '0S+xlJK8I8f0xv79u2SI9xNWEUDJ/Hz1aLevqk/gKJc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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