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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0562cd5082e19c4a6615089ff6f8d5cbb4e6e62b2a6aea7632e8c37c93bf9b63' 
  AND token = '4BVivW0fdf8V75qye28JBS5dOO+5TPQ7WtrLaWw2ksY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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