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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6caad92e401da4bad1c928f44c8b9403886a7085dea7c6efb73e4e496675fa88' 
  AND token = '+YQ0xNTfQwLDyPSiVQBNJcZa+WGMdAODku+c98GRP7I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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