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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c2aaddc21c3bb2ce3974b0163e4b9f530047995b1050a527fc7191706abb23e' 
  AND token = 'aMpm3IH42G4HQG+oFs/BLLy30Dw2gygSA7+g8NLK6e0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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