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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd80d631f91cb3ca7a1cc1c22aacba54bf23841aec890fd41f48973600cbe7291' 
  AND token = 'bg2/FAW1mVgOtqPCIeoMn4T1b46q3MKVVP3VNUFaNcg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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