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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92f5f40dba908d360bef04b9dd0e2becd5ae6107b5d1a1744aa8ae708ff09f89' 
  AND token = 'Jz3WTkx8tsGn8A2iUM8T+A/7DQNIvCnVE2dYwfh0dfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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