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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ede2a64aebf97e0628043721674b3f143b72ba48603654cea6c729a965c67c4f' 
  AND token = '7avrhd1jXUEqEK0rve51gnECAabM5tdQW02wscCL0VM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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